A fictional sport, Grifball has teams of players carrying a ball called a Grif to their respective goals; the grif can be thrown the same way you’d lob a grenade, and other players can catch it, allowing for passing.

Obviously, the other team tries to sieze the ball for themselves, but they’re restricted to two melee weapons. The hammer is a one-shot kill but doesn’t guarantee you’ll be able to retrieve the Grif, while the sword is slower but the Grif drops at your feet.

In more familiar modes, Oddball has been tweaked to employ the same grenade-throw mechanic as Grifball, and Capture the Flag has changed a bit to that the player transporting the pole crarries a “flagnum” weapon in one hand and can melee with the flag itself from the other.

Check out Grifball in action below. IGN has a couple of videos of Oddball and Capture the Flag, too.

Halo 4 launches in November, exclusive for Xbox 360. It’s being promoted by live action series Halo 4: Forward Unto Dawn, and is the first to be developed by a studio other than Bungie.